Audio processing device and method, and program therefor

Patent metadata

Field	Value
Publication number	US-2016337777-A1
Application number	US-201515110176-A
Country	US
Kind code	A1
Filing date	Jan 6, 2015
Priority date	Jan 16, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

The present technology relates to an audio processing device, a method therefor, and a program therefor capable of achieving more flexible audio reproduction.
An input unit receives input of an assumed listening position of sound of an object, which is a sound source, and outputs assumed listening position information indicating the assumed listening position. A position information correction unit corrects position information of each object on the basis of the assumed listening position information to obtain corrected position information. A gain/frequency characteristic correction unit performs gain correction and frequency characteristic correction on a waveform signal of an object on the basis of the position information and the corrected position information. A spatial acoustic characteristic addition unit further adds a spatial acoustic characteristic to the waveform signal resulting from the gain correction and the frequency characteristic correction on the basis of the position information of the object and the assumed listening position information. The present technology is applicable to an audio processing device.

First claim

1 . An audio processing device comprising:
a position information correction unit configured to calculate corrected position information indicating a position of a sound source relative to a listening position at which sound from the sound source is heard, the calculation being based on position information indicating the position of the sound source and listening position information indicating the listening position; and a generation unit configured to generate a reproduction signal reproducing sound from the sound source to be heard at the listening position, based on a waveform signal of the sound source and the corrected position information.

2 . The audio processing device according to claim 1 , wherein
the position information correction unit calculates the corrected position information based on modified position information indicating a modified position of the sound source and the listening position information.

3 . The audio processing device according to claim 1 , further comprising
a correction unit configured to perform at least one of gain correction and frequency characteristic correction on the waveform signal depending on a distance from the sound source to the listening position.

4 . The audio processing device according to claim 2 , further comprising
a spatial acoustic characteristic addition unit configured to add a spatial acoustic characteristic to the waveform signal, based on the listening position information and the modified position information.

5 . The audio processing device according to claim 4 , wherein
the spatial acoustic characteristic addition unit adds at least one of early reflection and a reverberation characteristic as the spatial acoustic characteristic to the waveform signal.

6 . The audio processing device according to claim 1 , further comprising
a spatial acoustic characteristic addition unit configured to add a spatial acoustic characteristic to the waveform signal, based on the listening position information and the position information.

7 . The audio processing device according to claim 1 , further comprising
a convolution processor configured to perform a convolution process on the reproduction signals on two or more channels generated by the generation unit to generate reproduction signals on two channels.

8 . An audio processing method comprising the steps of:
calculating corrected position information indicating a position of a sound source relative to a listening position at which sound from the sound source is heard, the calculation being based on position information indicating the position of the sound source and listening position information indicating the listening position; and generating a reproduction signal reproducing sound from the sound source to be heard at the listening position, based on a waveform signal of the sound source and the corrected position information.

9 . A program causing a computer to execute processing including the steps of:
calculating corrected position information indicating a position of a sound source relative to a listening position at which sound from the sound source is heard, the calculation being based on position information indicating the position of the sound source and listening position information indicating the listening position; and generating a reproduction signal reproducing sound from the sound source to be heard at the listening position, based on a waveform signal of the sound source and the corrected position information.

Assignees

• Sony Corp

Inventors

• Tsuji Minoru
• Chinen Toru

Classifications

• H04S2420/03

  Application of parametric coding in stereophonic audio systems · CPC title

• H04S2400/01

  Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved · CPC title

• H04S7/307

  Frequency adjustment, e.g. tone control (H04S7/301 takes precedence) · CPC title

• H04R1/40

  by combining a number of identical transducers {(specially adapted for hearing aids H04R25/405)} · CPC title

• H04S7/302 Primary

  Electronic adaptation of stereophonic sound system to listener position or orientation (H04S7/301 takes precedence) · CPC title